Tie for building-blocks.



PATENTED FEB. 25, 1908.

' A J. MUELLER.

TIE FOR BUILDZNG BLOCKS.

- APPLICATION FILED DEC.5,1907.

WITNEEEEE:

. 'FFICE.

nnrri srarns AUGUST J. MUELLER, OF CHICAGO, ILLINOIS. I

TIE FOR BUILDING-BLOCKS.

To all whom it may concern; Be it known that 1, AUGUST J. MUELLER,

citizen of the United States, residing at Chi- 'ment orrnortar toprevent separation of the abutting blocks; to, furnish a tie of specialformation that will engage the building blocks in a ositive manner,and-to supply 'the tie rnem ers with teeth or barbs ada ted to afford asecure hold in the mortar in W ich the said members are lei-l.

Further objects of this invention are to provide a tie especiallyadapted to be used in circular work such as the curved walls of wells,cisterns, and stacks;-to furnish a tie of such design that it can bechea ly manufaca turedyand to supply a device ofsuch a form that it canbe stam ed from sheet metal, provision being made for imparting the reuired rigidity by corrugating the niateria the sinuosities thus impartedto the article serv ing the additional purpose of affording an increasedopportunity for the adhesion of the binding-material.

I accomplish the above desirable results by the employment of the deviceillustrated in the accompanying drawing in'which the ap plication of thetie is clearly set forth in connection with circular wall construction,and the details of the tie member pointed out in the various figureswhich are as follows:

Figure 1 is a plan view of an arc of a curved wall in which my improvedtie member is employed; Fig. 2 is avertical section through a portion ofthe wall; Fig. 3 is a perspective view of a single block s owing a formwell adapted to be used in conjunction with the tie; Fig. 4 is a top lanview of a single block of a slightly mor ified form with two tie piecesin engagement therewith, and Fig. 5 is an edge view of the tie member.

Referring to the details of the drawing, the numeral 10 indicatesbuilding or construction blocks, having their inner and outerSpecification of Letters Patent.

Application filed December 6. 1907. Qerlal No. 405,148.

Patented Feb. 25, 1908.

faces 11, 12, respectively, curved to correspond with a common center,their end faces 13 being radial to the said faces 11 and 12, blocks ofsuch form being in common use. The upper and lower faces 'areparalleland are furnished with recesses or mortises, dovej tail in shape, whichare so arranged as to register with the adjacent blocks in the courses.These faces are also su plied with numerous depressions 15, into W ichthe plastic Inortar finds its way and thus afford a stronger holdtherefor. To link the adjacent blocks together, I provide tie plates 16,the sides of which have rentrant angles 17 the plates thus being adaptedto dove-tail the blocks together in the manner shown in Figs. 1 and 4.These plates are provided with a series of points or barbs, preferablytriangular in outline, which are struck up from the metal and bent inopposite directions to form additional holding means for the mortar,when the ties are embedded therein. The tieplates' are furnished withtransverse corrugr tions 19 which stiffen said plates and afford 'anuneven surface which serves as an additional bonding means for themortar 20.

In Fig. 2 the courses of blocks are shown slightly separated by a layerof riortar which penetrates therecesses 14, the bonding member 16 beingplaced in the recesses of the up-' per faces only. As shown in Fig. 2,these tie pieces or bonding members are completely embedded inthebonding mortar and by reason of their. dovetailed shape, the barbs 18and the corrugations 19, furnish alocking device of great strength andefficiency C0111- bined with aminimum amount of material. Having thusdescribed my invention, what I claim is 1. In combination with a wall, abondingmember consisting of a plate having its mar.

gins flaring outwardly from the middle,

plate, and transverse corrugations'in said plate.

2. A bonding member for wall construc tion, consisting of a corrugatedplate having dovetail shaped ends, and integrahbarbs projecting from theopposite surfaces of said plate.- 1

In testimony whereof I affix my signature in the presence of twowitnesses.

AUGUST J. MUELLER.

Witnesses: Y

NELLIE G. LYNon, A. F. CLARK.

' arbs projecting from the surfaces of the

